U.S. Air Force Airmen assigned to the 633rd Civil Engineer Squadron move a pipe across a moat during a Prime Base Engineer Emergency Force training at Joint Base Langley-Eustis, Va., April 20, 2017. The training is held at the leadership reaction course to encourage the Airmen to communicate, learn each other’s skills and sharpen their confidence. (U.S. Air Force photo/Airman 1st Class Kaylee Dubois)